Distro hopping is a pastime enjoyed by many Linux users. The variety of Linux distros out there makes it fun to experiment with different ones. This often involves dual booting, keeping your tried and trusted distro, and maybe windows too, and installing a new one alongside it. This works well until the dreaded day when you reboot after an installation to find that it has removed all traces of your other operating systems from the bootloader menu. This leaves you two choices - boot from a live CD and run various GRUB commands in a terminal to restore things, or boot from Super Grub Disk and pick the option you want from a menu.
Super Grub Disk does one thing only, but does it well, it helps you repair and modify your bootloader setup. the 1.4 MB image can be written to a CD, USB stick or even a floppy disk if you have such ancient technology. From here it presents a very basic looking, but effective, set of text menus from which you can restore your previous bootloader glory. I hope you'll never need this, but if bootloader disaster does strike, it's good to know help is at hand.